django order_不在服务器上运行,但在本地计算机上运行良好

class Leave(models.Model):
 from_date = models.DateField(verbose_name='From')
 to_date = models.DateField(verbose_name='To')
 leave_type = models.ForeignKey(TotalLeave,verbose_name='Type',null=True)
 message = models.CharField(max_length=1000,verbose_name='Message to your Manager regarding your leave',null=True)
 created_by = models.ForeignKey(User,related_name='created_user',null=True)
 created_datetime = models.DateTimeField(null=True,blank=True)
 last_modified_by = models.ForeignKey('auth.user',null=True)
 last_modified_date = models.DateTimeField(default=datetime.now,null=True)
 emp = models.ForeignKey('Employee',null=True)
 approval_status = models.BooleanField(default=False,verbose_name='Leaves approved or not ?')

查看:

@login_required
def all_requests(request):
    inner_qs = Employee.objects.filter(email=request.user.email)
    entries = Employee.objects.filter(reporting_manager__in=inner_qs)
    if (request.user.is_staff):
        if request.method == 'POST':
            month = request.POST.get('month')
            leaves = Leave.objects.filter(from_date__month=month).order_by('approval_status')
        else:
            leaves = Leave.objects.all().order_by('approval_status')
    else:
        leaves = Leave.objects.filter(emp__in=entries).order_by('approval_status')
    from django.db.models.functions import TruncMonth
    months = Leave.objects.annotate(month=TruncMonth('from_date')).values('month').annotate(c=Count('id')).values('month', 'c')